# GPT-6 Luna (Decisions) vs Grok 4.3

> Side-by-side benchmark comparison for GPT-6 Luna (Decisions) and Grok 4.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-luna-decisions-vs-grok-4-3
- Last updated: November 11, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for GPT-6 Luna (Decisions) and Grok 4.3.

## Summary

- GPT-6 Luna (Decisions) and Grok 4.3 do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | GPT-6 Luna (Decisions) | Grok 4.3 |
|----------|----------|----------|
| Creator | OpenAI | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Unspecified | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | null | 52.75 |
| Benchmarks Covered | 0 | 9 |
| Pricing (input/output) | $0.10 / $0.00 | $1.25 / $2.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6 Luna (Decisions) public-lane score: Coming soon
- Grok 4.3 public-lane score: 28.1 (Supported · #109/132)

| Benchmark | GPT-6 Luna (Decisions) | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | Coming soon | 43.86% | Coming soon |
| ResearchClawBench | Coming soon | 12.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 41.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-6 Luna (Decisions) public-lane score: Coming soon
- Grok 4.3 public-lane score: 26.9 (Supported · #120/158)

| Benchmark | GPT-6 Luna (Decisions) | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench (Vals) | Coming soon | 84.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 71.4% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6 Luna (Decisions) public-lane score: Coming soon
- Grok 4.3 public-lane score: 34.2 (Estimated · #106/158)

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6 Luna (Decisions) public-lane score: Coming soon
- Grok 4.3 public-lane score: 53.7 (Supported · #65/179)

| Benchmark | GPT-6 Luna (Decisions) | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 91.4% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 85.8% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-6 Luna (Decisions) public-lane score: Coming soon
- Grok 4.3 public-lane score: 97.1 (#1/157)

### Mathematics

- Winner: Insufficient shared evidence
- GPT-6 Luna (Decisions) public-lane score: Coming soon
- Grok 4.3 public-lane score: 47.4 (Unranked · 2 rankable rows)

| Benchmark | GPT-6 Luna (Decisions) | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 42.807% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 14.634% | Coming soon |

## FAQ

### Can I compare GPT-6 Luna (Decisions) and Grok 4.3 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [GPT-6 Luna (Decisions) vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-gpt-6-luna-decisions)
- [Grok 4.3 vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-grok-4-3)
- [GPT-6 Luna (Decisions) vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-gpt-6-luna-decisions)
- [Grok 4.3 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-grok-4-3)

## Explore More

- [GPT-6 Luna (Decisions) profile](/models/gpt-6-luna-decisions)
- [Grok 4.3 profile](/models/grok-4-3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)